Impossibility of Exact Flipping of Three Arbitrary Quantum States Via Incomparability

Indrani Chattopadhyay, Debasis Sarkar

Published 2005-11-04, updated 2006-04-14Version 2

We present here a scheme that relates seemingly two different kinds of physical impossibilities of quantum information processing. We derive, exact flipping of three arbitrary states not lying in one great circle is not possible with certainty, by using the existence of incomparable states which are not interconvertible deterministically by local operations and classical communications. In contrast, considering the non-existence of exact universal flipper, the incomparability of a pair of bipartite pure entangled states can be established.